removing burnt sugar from a coated cookie sheet
Definately soak--water and baking soda for a short while will do the trick as you don't want ot use any abrasives on coated 'baker's secret' type sheets.
Watch the protective coating once you've overheated this type of sheet. Mine are starting to chip so I'm tossing them. I only use them for English Toffee, which probably exceeds their heat tolerance?